Annunciator-drop.



S. H. COUGH,-W. W. HENRY 6L A. E. STEVENS.

ANNUNCIATOR DROP.

APPLlcATIoN FILED JULY 28. 191|.

Patented Apr. 13, 1915.

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n n-iran sfrAfrns rArnnr ormoni.

1SAMUEL HENRY COUCI-I AND WILLIAM WEIR HENRY, OF WOLLASTON, AND ALTON E.

STEVENS, 0E ATLANTIC, MASSACHUSETTS, ASSIGNORS T0 S. H. COUCI-I CO.INC., 0E

ATLANTIC, MASSACHUSETTS.

ANNUNCIATOR-DROP.

To all 'whom t may] concern:

Be it known that we, SAMUEL H. CoUCH and WILLIAM VVEIR HENRY, of'lVollaston,

and ALTON E. STEVENS, of Atlantic, in the county of Norfolk and State ofMassachusetts, all citizens of the United States, have invented certainnew and useful Improve-V ments in Annunciator-Drops, of which the I.following is a specification. 10

The object of this invention is to produce an annunciator drop for usein selective ringingv andv announcing systems which is reliable and surein its action. The invention introduces severaljnovel features which arecorrelative in producing this result, although our device is operativewith but a part of them, as will be explained.

In the drawings, which illustrate our invention and form part of thisspecification,-Figure 1 is a front view of one unit adapted to form partof a system, the operating means being shown diagrammatically. F ig. 9.Vis an edge View of same. Fig. 3 is a Vmid-vertical section, with disk invertical position. F ig. -t is an end View of same. Fig. 5 is an edgeview of the armature.

The base 1 supports an ordinary electromagnet 2 by means of the lip 3and screws 4. The armature 5 is pivotally mounted on stud or post 6, andone of the ears 7 has a bent prong 8 adapted to engage slot 9 in disk 10which is also pivotally mounted on post 6. Slot 9 is adapted to limitthe throw of disk l0, and the mechanism above described,

with the operating system 11, makes a comi' hand, an elastic stop isunsuitable for the same reason. v Ve have, therefore, provided a stop orstops 12, formed of soft, coldrolled steel and secured in an Voffsetposition to the base 1 by means of the same screws 4 which secure theelectro-magnet 2. The

Specification of Letters Patent. Patented Apr. 13, 19111 Application medJuly 28, 1911. seria; N9. 641,167.

nature ofthe material forming the stops 12 is such as to deaden theresilient or elastic..

effect ofthe impact of disk 10, while its olfset support permits aslight yieldingaction which further prevents the tendency to rebound.lAnother'means for preventing the rebound of disk 10 is shown in thedrawings whi'ch consists of an auxiliary disk or drag 15, said dragbeing loosely mounted on pin 16. The enlarged opening 17 in drag 15permitssaid drag to lag behind disk `10 during its throw, and whenthelimit of ythrow has been reached by disk 10, the drag 15 catches upand comes to a stop at the precise moment when any rebound tendency ofdisk V10 is mosteffective. The `impact'of drag 15, therefore, serves tointerrupt theV rebound vibrations of disk 10, and this insuresreliability of .actionV in the drop.

Either one of these several means is believed to be practically eectivealone, but we preferV to incorporate them all in our preferred form, asthey all add to the'efect sought.

'TWe prefer to `provide a German silver l washer 18 between base 1 andarmature 5to check any tendency of magnetic drag inthe latter.

What we claim is 1. An indicator adapted lto be thrown from a positionof rest, means for causing such throw, and a stop adapted to receive theimpact of the blow; in combination with a drag loosely mounted on saidindicator in such fashion that it will travel in unchanged relation withit until the stop checks the indicator movement, whereupon said drag isfree to continue its bodily advance through the space permitted by theloose mounting.

2. An indicator adaptedto be thrown from a position of rest, means forcausing such throw, and a stop adapted to Vreceive the impact of theblow; in combination with a drag mounted on said indicator andk adaptedto be moved therewith to thetimey of said impact, and thereafter to beadvanced by its Vmomentum Vbodily with respect to said indicator,through a limited space. l

n 3. An indicator adapted to be thrown from a position of rest, meansfor causing such throw and ymeans for limiting the movea drag so mountedin connection with said indicator that it shall be moved by the latmentof said indicator; in combination with. .Y

unchanged relation thereto to the time of impact and thereafter shalldeliver its own impact to prevent rebound of said indicator. 15 lntestimony whereof we have athXed our signatures, in presence of twowitnesses.

SAMUEL HENRY COUCH. VILLIAM YVEIR HENRY. ALTON E. STEVENS.

Witnesses:

WVM. COUCH, ALBERT M. Jd'AY.

Copies of this patent may be obtained for ve L'cents each, addressingthe i G'omi'niss'oner `of Patents,

Washington, D. C.

